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About Dialing Out to the ISDN Network via the Gateway
A
G
BOUT
ATEWAY
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ERVICE
REFIXES
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SCOPIA 400/1000 Gateway User Guide
Gateway services define different call types and bandwidths for IP network
endpoints. The services are identified by service prefixes. The network
administrator in charge of the H.323 network is responsible for defining services
and informing users of available services. See
page 123 for more information.
A service prefix should not be the same as the first digits of an IP endpoint
Note
phone number.
Dialing Example 1: Voice calls (PRI Gateway and Serial Gateway only)
The number string 912015294300 is a voice call from an IP network terminal to
an H.323 endpoint on another IP network or to a terminal on the ISDN network.
This number string consists of:
9—The service prefix for a voice call.
12015294300—The destination phone number including the area
code.
Dialing Example 2: Voice calls with the auto bit-rate setting service (PRI Gateway and
Serial Gateway only)
The number string 712015294300 is a voice call from an IP network terminal to
an H.323 endpoint on another IP network or to a terminal on the ISDN network
using a service with the bit rate setting of auto. This number string consists of:
7—The auto bit-rate setting service prefix for a voice call.
12015294300—The destination phone number including the area
code.
The bit rate of the call is fixed according to the setting in the source IP network
terminal.
Dialing Example 3: 1B video calls
The number string 821816455318 is a 1B video call from an IP network
terminal to an H.323 endpoint on another IP network or to a terminal on the
ISDN network. This number string consists of:
82—The service prefix for a 1B video call.
1816455318—The destination phone number including the area
code.
About Gateway Services
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